Namsan
This water likely runs into Manchocheon.
Yes, these children were cooperative if unknowing models.
Don't go in, the water is totally not safe.
I considered this might lead down to a stream. There was a worker nearby so I returned a few days later, threw the hatch open, and saw only machinery below.
This almost certainly leads to water infrastructure.
FYI.
A better look at the whole complex. I believe there is running water under those canopies.
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Please remember that these photos are all copyrighted to me. If you want to use them in any way, there's a 90 per cent chance I'll give you my permission, and be able to give you a copy with a higher DPI.Copyright Daehanmindecline 2019